If what you are teaching doesn’t _____ to your students, your students will gradually lose interest in it.

The most important _____ of his speech at the G20 summit was that we should all unite to fight against the financial．

Health problems are closely connected with bad eating habits and a _______ of exercise.

It is important to have your eyes examined regularly to check for any sign of eye disease that may not have any __________.

— Can I help you with it?— I appreciate your _______, but I can manage it myself.